One of the hardest problems (for me) is to get the two jacks in the rear the same. Several times I have set up only to look later and one of the pads will be off the ground a little. I have mostly solved that problem by using my 18 volt Black and Decker impact driver/drill to lower and raise the jacks. I set the dial to 22, which is the highest setting and run the legs down until the drill starts to skip(?) quit turning. Then I know that both legs have the same amount of pressure on them. On my MPG, the jack nut is a 13/16. Sure saves a lot of cranking to lower and raise the legs. Also, from what I have observed on the tongue jack, is to remove three bolts, put the new one in , replace the bolts and run one wire to the battery.